"1900 United States Federal Census". Year: 1900; Census Place: Cambridge Ward 4, Middlesex, Massachusetts; Roll: 657; Page: 1A; Enumeration District: 0717; FHL microfilm: 1240657. Retrieved 14 June 2016.
"1880 United States Federal Census". Year: 1880; Census Place: Cambridge, Middlesex, Massachusetts; Roll: 543; Family History Film: 1254543; Page: 180A; Enumeration District: 441. Retrieved 14 June 2016.
"1940 United States Federal Census". Year: 1940; Census Place: Cambridge, Middlesex, Massachusetts; Roll: T627_1684; Page: 11B; Enumeration District: 16-66. Retrieved 14 June 2016.